Qualla: Fairy Circles

Fairy Circles: Introduction

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Thorsten Becker (= Beavis729, Beavis729), CC BY-SA 2.0 de. Fly low over the grasslands of the Namib and the ground looks diseased. Thousands of bare circles, each between two and twelve meters across, pock the landscape in an almost unnervingly regular pattern -- like polka dots stamped onto the earth by something with a sense of geometry. A ring of taller, greener grass borders each bare patch, making the pattern even more conspicuous. The Himba people of northern Namibia say their ancestor Mukuru made them. Some tour guides blame a dragon living underground whose poisonous breath kills the vegetation. Scientists, after a century of study, have offered explanations nearly as varied -- and until recently, nearly as inconclusive.

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Image: Thorsten Becker (= Beavis729, Beavis729) | CC BY-SA 2.0 de

Fairy Circles: Footprints of the Gods

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit No machine-readable author provided. Beavis729 assumed (based on copyright claims)., Public domain. The circles were first noted in technical literature in the 1920s, but the Himba and San peoples of the region had known about them far longer. To the Himba, they are the work of gods, spirits, or their original ancestor Mukuru. The San have traditionally ascribed spiritual and m...

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Image: No machine-readable author provided. Beavis729 assumed (based on copyright claims). | Public domain

Fairy Circles: The Termite Wars

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Public domain. For decades, the leading explanation blamed termites. In 2012, Eugene Moll proposed that the species Baucaliotermes hainsei and Psammotermes allocerus created the circles by clearing vegetation. Every ring examined contained termite casts, and radar showed moist soil beneath. The...

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Image: Public domain

Fairy Circles: When Grasses Compete

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Lidine Mia, CC BY-SA 4.0. The alternative explanation is elegant and strange: the circles may be the landscape organizing itself. In arid environments, plants compete fiercely for water. The theory holds that grasses essentially sacrifice the center of each patch, allowing rain to collect in the bare soil...

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Image: Lidine Mia | CC BY-SA 4.0

Fairy Circles: Born and Dying

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit SAplants, CC BY-SA 4.0. Each fairy circle has a lifespan. They become visible at about two meters in diameter, grow to a peak of perhaps twelve meters, then slowly "die" as grasses invade the center. The full cycle takes between 30 and 60 years, though some circles may persist for centuries. What makes ...

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Image: SAplants | CC BY-SA 4.0

Fairy Circles: Turing Patterns in the Sand

Tue, 24 Mar 2026 00:00:00 GMT

Photo credit Lidine Mia, CC BY-SA 4.0. Perhaps the most remarkable aspect of fairy circles is what they share with leopard spots, zebra stripes, and the branching patterns of coral. The mathematician Alan Turing proposed in 1952 that such patterns could arise from the interaction of chemical substances diffusing at di...

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Image: Lidine Mia | CC BY-SA 4.0